The Salso (Sicilian: Salsu), also known as the Imera Meridionale (Greek: ; Latin Himera), is a river of Sicily. It rises in the Madonie Mountains (Latin: Nebrodes Mons; Sicilian: Munti Madunìi) and, traversing the provinces of Enna and Caltanissetta, flows into the Mediterranean at the western end of the Gulf of Gela at the seaport of Licata, in the Province of Agrigento. Its small deltaic system there is dominated by marine processes rather than fluvial ones. It is a seasonal torrent, with brief but violent floods during the winter rains (from November to February), and all but dry in summer droughts. In November 1915 the iron bridge across the river's mouth collapsed during floods, and 119 people were swept away in the flood and lost. The Salso, which is the longest river of Sicily at , has a drainage basin area of . The river's historically changeable meanders across the low coastal plain have been artificially channeled into the Canale di Sicilia, and the marshes drained for agriculture. Until the late nineteenth century it had two distributary channels, the second debouching to the west. The mouth of the Salso has been advancing during historical times, and wind and wave formerly distributed its sand and silt to the beaches of the Gulf of Gela. Historical significance Himera was the ancient name of two rivers in Sicily, the Imera Settentrionale flowing to the north into the Tyrrhenian Sea, and the Salso to the south coast of the island, but which, by a strange confusion, were regarded by many ancient writers as one and the same river, which is in consequence described as rising in the center of the island, and flowing in two different directions, so as completely to divide Sicily into two parts. According to Vibius Sequester, this idea dates back to the time of Stesichorus, who was himself a native of the city of Himera. Pomponius Mela is, however, the only ancient geographer who adopts it. The Salso enters the sea at Licata (the ancient Phintias). In the upper part of its course it is composed of two branches, running nearly parallel with one another; the one now called the Imera Settentrionale rising near Gangi, the other, called the Fiume di Petralia, from the town of the same name: it is only after the junction of the two that the river is called Salso. It is impossible to say which